Dont overcomplicate.
Where is the 4" long bit of thin wall pipe that is supposed to stick out of the block?
When you get a bit of straight pipe shoved in, the nside end needs a couple of holes in the end, a piece of hose in an upward slope, to go into a metal catch can, use a rectangular olive oil can, spray paint it black, for secrecy.
And then run another hose from rocker cover breather, into can.
Then drill half dozen holes on top, to vent the lot.
Bring car, can, hose, bit of pipe clamps around, look at all mine to get idea, and fit yours.
You dont want it drained back in, it will have moisture condensation in it, the top breather is sucked into airfilter, the bottom breather goes into intake mani.
Dirty air, not good for engine.
The small ebay things, if you really want one, i have some here, are a bit small, and useless.